CDLL4778/TR

Single Zener Diodes Overview

The CDLL4778/TR is a hermetically sealed glass-encapsulated Zener diode manufactured by Microchip Technology. It features a DO-213AA (SMB) surface-mount package designed for high-reliability applications. The device provides precise voltage regulation with a nominal Zener voltage of 30V at a test current of 5mA. Key electrical characteristics include a maximum Zener impedance of 10 ohms and a leakage current of 1 microampere at the rated voltage. The component operates within a temperature range of -65°C to +175°C, ensuring stability in extreme environments.

Single Zener Diodes Feature Summary

• Hermetically sealed glass encapsulation for enhanced environmental protection
• High thermal stability suitable for wide operating temperature ranges
• Precise voltage regulation capabilities for sensitive circuitry

Single Zener Diodes Applications

• Voltage reference circuits in aerospace systems
• Overvoltage protection in military-grade electronics
• Precision regulation in harsh environment instrumentation

Single Zener Diodes Procurement Notes

Verify the specific suffix TR indicates tape and reel packaging when ordering. Confirm the exact Zener voltage tolerance class required for your design against the datasheet specifications. Ensure compatibility with automated placement equipment due to the SMB package form factor. Check for any RoHS or REACH compliance documentation if required by your supply chain standards.

Single Zener Diodes Selection Notes

Select this component when hermetic sealing is mandatory for reliability. Consider the 30V breakdown voltage and low leakage current requirements. Evaluate the thermal resistance and power dissipation limits under expected load conditions. Compare alternative packages if space constraints differ from the standard SMB footprint.

Single Zener Diodes Part Context

This part belongs to Microchip's line of hermetically sealed Zener diodes. These components are typically used in applications requiring high reliability and radiation hardness. The CDLL series offers superior performance compared to standard plastic-encapsulated equivalents in demanding environments.

Single Zener Diodes Replacement Considerations

Check for equivalent parts from other manufacturers offering hermetically sealed SMB Zener diodes with 30V nominal voltage. Verify pinout compatibility and mechanical dimensions before substitution. Ensure replacement parts meet the same MIL-spec or high-reliability standards.